Peroxides and Peroxo Compounds

The geometry and probable electronic structure of HgOg are shown in Fig. 200. 

The heat and free energy of formation are much lower than for water  

Hydrogen peroxide is a strong oxidising agent in both acid and alkaline solutions  

But with some strong oxidising agents, such as Clg, or M11O4- in acid solution, hydrogen peroxide is itself oxidised  

The standard redox potential of the cyanoferrate(III)-cyanoferrate(II) couple (4-0.356 V) lies between these two values. As a result H2O2 will oxidise a cyanoferrate(II) in acid solution  

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Concentrated ammonia is an irritant and the vapour affects the eyes, the skin and respiratory system. In hot weather, if the cap of its vessel is not carefully released, copious vapour rushes from the container. Solid hydroxides of sodium and potassium should not be used to dry tetrahydrofiiran. Peroxides and peroxo-compounds should be carefully used. 

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